/* * Sonics Silicon Backplane SoC host related functions. * Subsystem core * * Copyright 2005, Broadcom Corporation * Copyright 2006, 2007, Michael Buesch <m@bues.ch> * * Licensed under the GNU/GPL. See COPYING for details. */ #include <linux/bcm47xx_nvram.h> #include <linux/ssb/ssb.h> #include "ssb_private.h" static u8 ssb_host_soc_read8(struct ssb_device *dev, u16 offset) { struct ssb_bus *bus = dev->bus; offset += dev->core_index * SSB_CORE_SIZE; return readb(bus->mmio + offset); } static u16 ssb_host_soc_read16(struct ssb_device *dev, u16 offset) { struct ssb_bus *bus = dev->bus; offset += dev->core_index * SSB_CORE_SIZE; return readw(bus->mmio + offset); } static u32 ssb_host_soc_read32(struct ssb_device *dev, u16 offset) { struct ssb_bus *bus = dev->bus; offset += dev->core_index * SSB_CORE_SIZE; return readl(bus->mmio + offset); } #ifdef CONFIG_SSB_BLOCKIO static void ssb_host_soc_block_read(struct ssb_device *dev, void *buffer, size_t count, u16 offset, u8 reg_width) { struct ssb_bus *bus = dev->bus; void __iomem *addr; offset += dev->core_index * SSB_CORE_SIZE; addr = bus->mmio + offset; switch (reg_width) { case sizeof(u8): { u8 *buf = buffer; while (count) { *buf = __raw_readb(addr); buf++; count--; } break; } case sizeof(u16): { __le16 *buf = buffer; SSB_WARN_ON(count & 1); while (count) { *buf = (__force __le16)__raw_readw(addr); buf++; count -= 2; } break; } case sizeof(u32): { __le32 *buf = buffer; SSB_WARN_ON(count & 3); while (count) { *buf = (__force __le32)__raw_readl(addr); buf++; count -= 4; } break; } default: SSB_WARN_ON(1); } } #endif /* CONFIG_SSB_BLOCKIO */ static void ssb_host_soc_write8(struct ssb_device *dev, u16 offset, u8 value) { struct ssb_bus *bus = dev->bus; offset += dev->core_index * SSB_CORE_SIZE; writeb(value, bus->mmio + offset); } static void ssb_host_soc_write16(struct ssb_device *dev, u16 offset, u16 value) { struct ssb_bus *bus = dev->bus; offset += dev->core_index * SSB_CORE_SIZE; writew(value, bus->mmio + offset); } static void ssb_host_soc_write32(struct ssb_device *dev, u16 offset, u32 value) { struct ssb_bus *bus = dev->bus; offset += dev->core_index * SSB_CORE_SIZE; writel(value, bus->mmio + offset); } #ifdef CONFIG_SSB_BLOCKIO static void ssb_host_soc_block_write(struct ssb_device *dev, const void *buffer, size_t count, u16 offset, u8 reg_width) { struct ssb_bus *bus = dev->bus; void __iomem *addr; offset += dev->core_index * SSB_CORE_SIZE; addr = bus->mmio + offset; switch (reg_width) { case sizeof(u8): { const u8 *buf = buffer; while (count) { __raw_writeb(*buf, addr); buf++; count--; } break; } case sizeof(u16): { const __le16 *buf = buffer; SSB_WARN_ON(count & 1); while (count) { __raw_writew((__force u16)(*buf), addr); buf++; count -= 2; } break; } case sizeof(u32): { const __le32 *buf = buffer; SSB_WARN_ON(count & 3); while (count) { __raw_writel((__force u32)(*buf), addr); buf++; count -= 4; } break; } default: SSB_WARN_ON(1); } } #endif /* CONFIG_SSB_BLOCKIO */ /* Ops for the plain SSB bus without a host-device (no PCI or PCMCIA). */ const struct ssb_bus_ops ssb_host_soc_ops = { .read8 = ssb_host_soc_read8, .read16 = ssb_host_soc_read16, .read32 = ssb_host_soc_read32, .write8 = ssb_host_soc_write8, .write16 = ssb_host_soc_write16, .write32 = ssb_host_soc_write32, #ifdef CONFIG_SSB_BLOCKIO .block_read = ssb_host_soc_block_read, .block_write = ssb_host_soc_block_write, #endif }; int ssb_host_soc_get_invariants(struct ssb_bus *bus, struct ssb_init_invariants *iv) { char buf[20]; int len, err; /* Fill boardinfo structure */ memset(&iv->boardinfo, 0, sizeof(struct ssb_boardinfo)); len = bcm47xx_nvram_getenv("boardvendor", buf, sizeof(buf)); if (len > 0) { err = kstrtou16(strim(buf), 0, &iv->boardinfo.vendor); if (err) pr_warn("Couldn't parse nvram board vendor entry with value \"%s\"\n", buf); } if (!iv->boardinfo.vendor) iv->boardinfo.vendor = SSB_BOARDVENDOR_BCM; len = bcm47xx_nvram_getenv("boardtype", buf, sizeof(buf)); if (len > 0) { err = kstrtou16(strim(buf), 0, &iv->boardinfo.type); if (err) pr_warn("Couldn't parse nvram board type entry with value \"%s\"\n", buf); } memset(&iv->sprom, 0, sizeof(struct ssb_sprom)); ssb_fill_sprom_with_fallback(bus, &iv->sprom); if (bcm47xx_nvram_getenv("cardbus", buf, sizeof(buf)) >= 0) iv->has_cardbus_slot = !!simple_strtoul(buf, NULL, 10); return 0; }